JB/T 7829-2006Heat-shrinkable terminations for power cables with rated voltages from 1kV (Um=1.2kV) up to 35kV (Um=40.5kV) (English PDF)

1 Scope

This standard specifies the product marks and codes, technical requirements, test methods, inspection rules, markings, packaging, transport and storage of heat-shrinkable terminals for power cables with rated voltage 1 kV (Um = 1.2 kV) to 35 kV (Um = 40.5 kV).

This standard is applicable to the extruded insulated power cable which has a rated voltage of 1 kV (Um = 1.2 kV) to 35 kV (Um = 40.5 kV) as well as the heat-shrinkable indoor and outdoor terminals for paper-insulated power cables which have rated voltage of 1 kV (Um = 1.2 kV) to 10 kV (Um = 12 kV); the conditions of use comply with the provisions of 5.1 and 5.2 in GB/T 12706.4-2002 and the provisions of 22.2 and 22.3 in IEC 60055-1:1997.

2 Normative references

The provisions in following documents become the provisions of this Standard through reference in this Standard. For the dated references, the subsequent amendments (excluding corrections) or revisions do not apply to this Standard; however, parties who reach an agreement based on this Standard are encouraged to study if the latest versions of these documents are applicable.

For undated references, the latest edition of the referenced document applies.

GB/T 1034-1998 Plastics - Determination of water absorption (eqv ISO 62:1980)

GB/T 1040-1992 Plastics - Determination of tensile properties

GB/T 1408.1-1999 Methods of test for electric strength of solid insulating materials - Tests at power frequencies (eqv IEC 60243-1:1988)

GB/T 1409-1988 Methods for the determination of the permittivity and dielectric dissipation factor of solid electrical insulating materials at power, audio and radio frequencies including meter wavelengths eqv IEC 60250:1969)

GB/T 12706.2-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um = 1.2kV) up to 35kV (Um = 40.5kV) - Part 1: Cables for rated voltages from 6kV (Um = 7.2kV) up to 30kV (Um = 36kV) (eqv IEC 60502-2:1997)

GB/T 12706.3-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um = 1.2kV) up to 35kV (Um = 40.5kV) - Part 3: Cables for rated voltages of 35kV (Um = 40.5kV) (IEC 60502 2:1997, NEQ).

GB/T 12706.4-2002 Power cables with extruded insulation and their accessories for rated voltages from 1kV (Um = 1.2kV) up to 35kV (Um = 40.5kV) - Part 4:Test requirements on accessories for cables with rated voltages from 6kV (Um = 7.2kV) up to 35kV (Um = 40.5kV) (eqv IEC 60502-4:1997)

GB/T 12976.1 ~ 12976.3-1991 Copper or aluminum conductor paper-insulated power cables with rated voltages up to 35kV

GB/T 14049-1993 Rated voltage 35kV, 10kV overhead insulated cable

GB/T 14315-1993 Crimp-type copper and aluminum terminals and connecting sleeves for power cable conductors

GB/T 18889-2002 Electric cables-test methods for accessories for power cables with rated voltage from 6kV (Um = 7.2kV) up to 35kV (Um = 40.5kV) (IEC 61442:1997, MOD)

IEC 60055-1:1997 Paper-insulated metal-sheathed cables for rated voltages up to 18/30 kV (with copper or aluminum conductors and excluding gas-pressure and oil-filled cables) - Part 1: Tests on cables and their accessories

3 Terms and definitions

The terms and definitions as defined in GB/T 2900.10-2001 and GB/T 12706.4-2002 as well as the following terms and definitions are applicable to this standard.

4 Product model and representation

5 Technical requirements

8 Scope of approval

8.6 To achieve the approval of different types of extruded insulated cable's insulation shields and the extension of approval from round conductors to shaped conductors, the test shall be carried out in accordance with the provisions of Table 8. The number of test samples shall be half of the series 1 in Figure 1.

8.7 Tests conducted on three-core cable terminals shall be considered to be applicable to single-core cable terminals of the same design; however, it is not applicable if reversed.

8.8 After approval of the terminal of the specified U0, it will be extended to terminals with the same design principles lower than the recognized value.

8.9 The test arrangement and the number of samples are described in detail in Figure 1.

9 Inspection rules

9.1 All components and materials of the product can only be exit-factory after being checked qualified by the technical inspection department of the manufacturer, meanwhile it shall be attached with the corresponding quality inspection certificate.

9.2 The type test of the product shall be carried out in accordance with the requirements of 5.1 ~ 5.3, Tables 3 and 4 in 5.6. The number of samples and the evaluation method of the test results shall be as specified in Figure 1, Table 3, Table 4, Chapter 7.

9.3 During normal production, the sampling test of the product shall be conducted in accordance with the requirements of 5.2, Tables 5 and 6 of 5.6 every 3 ~ 5 years. The number of samples and the evaluation method of the test results shall be in accordance with series 1 in Figure 1, Table 5, Table 6 as well as the provisions in Chapter 7. When the user makes a request, after the agreement between the two parties, the test shall also be conducted according to the sampling test.

9.4 Heat-shrinkable parts shall be subjected to routine tests in accordance with A.1, A.3, A.7.

10 Signs, packaging, transportation, storage

10.1 The main materials and components for the terminal shall be marked with the designation, name, factory name and production date; it shall be […]

Appendix E (Informative)

Key points of heat-shrinkable terminal's installation process This Appendix is the main matters that shall be paid attention to when installing the heat-shrinkable terminal. For the specific installation operation process, please refer to the product installation manual provided by the manufacturer.